That wouldn't be difficult to add. Just add another parameter to the EQ effect. In skins, the 4th knob can be shown conditionally depending on the num_parameters ControlObject of the loaded EQ effect.
That wouldn't be difficult to add. Just add another parameter to the EQ effect. In skins, the 4th knob can be shown conditionally depending on the num_parameters ControlObject of the loaded EQ effect.